/Engine/Source/Editor/UnrealEd/Public/Subsystems/EditorAssetSubsystem.h
Duplicate an asset that is already loaded. Will try to checkout the file.
The duplicated object if the operation succeeds
[UObject](API\Runtime\CoreUObject\UObject\UObject) * DuplicateLoadedAsset ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * SourceAsset, const [FString](API\Runtime\Core\Containers\FString) & DestinationAssetPath )